dts: change remote and local paths objects

The OSSession (and its subclasses) should accept PurePaths
for remote paths to translate from OS-unaware (PurePath)
to OS-aware (Path) only on the remote s

dts: change remote and local paths objects

The OSSession (and its subclasses) should accept PurePaths
for remote paths to translate from OS-unaware (PurePath)
to OS-aware (Path) only on the remote side. For local paths,
they should accept Paths, as Python is OS-aware locally.

Signed-off-by: Tomáš Ďurovec <tomas.durovec@pantheon.tech>
Signed-off-by: Luca Vizzarro <luca.vizzarro@arm.com>

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dts: clean up close in remote session

The close method was split into two methods, one with common code and
one that's subclass specific. There wasn't any common code so the split
doesn't make sense

dts: clean up close in remote session

The close method was split into two methods, one with common code and
one that's subclass specific. There wasn't any common code so the split
doesn't make sense. And if we ever need such a split, we can use super()
in the future.
There was also an unused argument, force and the order of methods was
cleaned up a little (close is usually the last thing we call in the
lifecycle of a session object, so it was moved to the last place among
public methods).

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Reviewed-by: Jeremy Spewock <jspewock@iol.unh.edu>
Reviewed-by: Luca Vizzarro <luca.vizzarro@arm.com>

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dts: update mypy static checker

Update the mypy static checker to the latest version and fix all the
reported errors.

Bump up supported Poetry shell version.

Bugzilla ID: 1433

Signed-off-by: Luca

dts: update mypy static checker

Update the mypy static checker to the latest version and fix all the
reported errors.

Bump up supported Poetry shell version.

Bugzilla ID: 1433

Signed-off-by: Luca Vizzarro <luca.vizzarro@arm.com>
Reviewed-by: Paul Szczepanek <paul.szczepanek@arm.com>
Reviewed-by: Jeremy Spewock <jspewock@iol.unh.edu>
Reviewed-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Reviewed-by: Nicholas Pratte <npratte@iol.unh.edu>
Tested-by: Nicholas Pratte <npratte@iol.unh.edu>

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dts: update docstrings

Format according to the Google format and PEP257, with slight
deviations.

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>

dts: adjust code for doc generation

The standard Python tool for generating API documentation, Sphinx,
imports modules one-by-one when generating the documentation. This
requires code changes:
* pro

dts: adjust code for doc generation

The standard Python tool for generating API documentation, Sphinx,
imports modules one-by-one when generating the documentation. This
requires code changes:
* properly guarding argument parsing in the if __name__ == '__main__'
block,
* the logger used by DTS runner underwent the same treatment so that it
doesn't create log files outside of a DTS run,
* however, DTS uses the arguments to construct an object holding global
variables. The defaults for the global variables needed to be moved
from argument parsing elsewhere,
* importing the remote_session module from framework resulted in
circular imports because of one module trying to import another
module. This is fixed by reorganizing the code,
* some code reorganization was done because the resulting structure
makes more sense, improving documentation clarity.

The are some other changes which are documentation related:
* added missing type annotation so they appear in the generated docs,
* reordered arguments in some methods,
* removed superfluous arguments and attributes,
* change private functions/methods/attributes to private and vice-versa.

The above all appear in the generated documentation and the with them,
the documentation is improved.

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>

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dts: add SSH session

The module uses the pexpect python library and implements connection to
a node and two ways to interact with the node:
1. Send a string with specified prompt which will be match

dts: add SSH session

The module uses the pexpect python library and implements connection to
a node and two ways to interact with the node:
1. Send a string with specified prompt which will be matched after
the string has been sent to the node.
2. Send a command to be executed. No prompt is specified here.

Signed-off-by: Owen Hilyard <ohilyard@iol.unh.edu>
Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>

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