fix: workspaceContext initialization across apex & replay-debugger packages

[AnanyaJha]

What does this PR do?

This PR changes how we are initializing the workspaceContext service in the apex and replay-debugger packages. This fixes an issue where 'Run Test' and 'Debug & Run Test' were not picking up the default org when the project was opened for the first time.

What issues does this PR fix or reference?

#2883, @W-8732172@

[codecov]

Codecov Report

Merging #2868 (9343612) into develop (bd8b055) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #2868      +/-   ##
===========================================
- Coverage    75.78%   75.76%   -0.02%     
===========================================
  Files          278      277       -1     
  Lines        10653    10639      -14     
  Branches      1229     1228       -1     
===========================================
- Hits          8073     8061      -12     
+ Misses        2238     2237       -1     
+ Partials       342      341       -1     

Impacted Files	Coverage Δ
...e-apex-replay-debugger/src/commands/quickLaunch.ts	83.92% <100.00%> (ø)
...de-apex/src/commands/forceApexTestRunCodeAction.ts	82.60% <100.00%> (ø)
...orcedx-vscode-core/src/context/workspaceContext.ts

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