vNext: Port recent features and fixes from v2

[t1m0thyj]

Proposed changes

• Fix undefined node error on save #2801
• Fix race condition in ProfilesCache refresh #2838
• Fix command not assigned to new member nodes #2872
• Fix regression with clearing profile object caches on refresh #2917
• Fix extender registration failure with multiple registrations #2919
• Fix downloading spool files failing to match tree nodes #2943

Release Notes

Milestone:

Changelog:

Types of changes

What types of changes does your code introduce to Zowe Explorer?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Updates to Documentation or Tests (if none of the other choices apply)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This checklist will be used as reference for both the contributor and the reviewer

• I have read the CONTRIBUTOR GUIDANCE wiki
• PR title follows Conventional Commits Guidelines
• PR Description is included
• gif or screenshot is included if visual changes are made
• yarn workspace vscode-extension-for-zowe vscode:prepublish has been executed
• All checks have passed (DCO, Jenkins and Code Coverage)
• I have added unit test and it is passing
• I have added integration test and it is passing
• There is coverage for the code that I have added
• I have tested it manually and there are no regressions found
• I have added necessary documentation (if appropriate)
• Any PR dependencies have been merged and published (if appropriate)

Further comments

[codecov]

Codecov Report

Attention: Patch coverage is 95.71429% with 3 lines in your changes missing coverage. Please review.

Project coverage is 92.67%. Comparing base (2840315) to head (e45522b).

Files	Patch %	Lines
packages/zowe-explorer/src/trees/job/JobTree.ts	33.33%	2 Missing ⚠️
...ckages/zowe-explorer/src/configuration/Profiles.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #2947      +/-   ##
==========================================
+ Coverage   92.62%   92.67%   +0.04%     
==========================================
  Files         110      110              
  Lines       10985    10943      -42     
  Branches     2337     2363      +26     
==========================================
- Hits        10175    10141      -34     
+ Misses        808      800       -8     
  Partials        2        2              

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[JillieBeanSim]

LGTM! thanks @t1m0thyj

[sonarcloud]

Quality Gate failed

Failed conditions
6.8% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[zFernand0]

LGTM! 😋
Thanks for porting over the changes 😋