Ensure recover from bad tracker IDs

[TheDuckCow]

This PR implements a few things:

• Detect if a "bad install id" is found in the addon folder. If so, fetch a new ID or recover from the parent folder's ID (if not a bad id itself)
• General tests for the tracker.py file to ensure it's working as intended for the top-levle public methods
• Test to validate this new recovery mechanism works exactly as intended
• A critical test to avoid ever shipping a new build with a prepackaged json id, which was how this whole problem started.

Closes #491

All tests pass:

-------------------------------------------------------------------------------
bversion   	ran_tests	ran	skips	failed	errors
-------------------------------------------------------------------------------
(3.6.2)   	all_tests	64	2	0	No errors
(4.0.0)   	all_tests	64	2	0	No errors
(3.5.1)   	all_tests	64	2	0	No errors
(3.4.0)   	all_tests	64	2	0	No errors
(3.3.1)   	all_tests	64	2	0	No errors
(3.2.1)   	all_tests	64	2	0	No errors
(3.1.0)   	all_tests	64	2	0	No errors
(3.0.0)   	all_tests	64	2	0	No errors
(2.93.0)   	all_tests	63	3	0	No errors
(2.90.1)   	all_tests	63	3	0	No errors
(2.80.75)   	all_tests	62	4	0	No errors
tests took 219s to run

[StandingPadAnimations]

Since no one else seems to want to take charge of reviewing this, I'll just add my comments.

Seems good to me, albeit with some minor nitpicks I have in terms of style, but nothing seems off in the actual logic itself.

I won't approve or reject this PR though. I'll leave that to someone else (looking at y'all @zNightlord and @MajesticalDiscomfort)

[StandingPadAnimations]

I think it'll be worthwhile to see how this would look with pathlib, since pathlib tends to be clearer

[TheDuckCow]

idk I'm still a bit torn on pathlib always being better. It means we're more likely to stick with long lines, whereas right now I sort of like the multi line input arguments as clearly each segment of the path.

is this how you'd write that first line? (noting this goes over 80 charcters)

		self._tracker_idbackup = Path(
			os.path.dirname(__file__) / os.pardir / self._addon + "_trackerid.json")

In retrospect, the lines where we are using Pathlib are the ones most exceeding line lengths now in files like conf.py (even if we push to a newline after the ( in Path(, still exceeds line length for the definition of self.json_path_update)

I'll probably stick with this and merge this in the meantime, but feel free to comment after merging if I'm overlooking something.

[TheDuckCow]

Changes pushed, going to merge shortly.

-------------------------------------------------------------------------------
bversion   	ran_tests	ran	skips	failed	errors
-------------------------------------------------------------------------------
(3.6.2)   	all_tests	64	2	0	No errors
tests took 17s to run