Switch to first available namespace

[datho7561]

When the currently configured namespace doesn't exist, switch to the first available namespace.

Closes #2180

Signed-off-by: David Thompson davthomp@redhat.com

[codecov]

Codecov Report

Patch coverage: 40.00% and project coverage change: +0.02 🎉

Comparison is base (8824f77) 33.98% compared to head (f0354f2) 34.00%.

❗ Current head f0354f2 differs from pull request most recent head 5618f79. Consider uploading reports for the commit 5618f79 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2837      +/-   ##
==========================================
+ Coverage   33.98%   34.00%   +0.02%     
==========================================
  Files          70       70              
  Lines        4326     4332       +6     
  Branches      777      778       +1     
==========================================
+ Hits         1470     1473       +3     
- Misses       2856     2859       +3     

Impacted Files	Coverage Δ
src/odo/command.ts	13.93% <0.00%> (-0.18%)	⬇️
src/odo3.ts	42.85% <33.33%> (-3.30%)	⬇️
src/explorer.ts	31.48% <50.00%> (-0.60%)	⬇️

... and 1 file with indirect coverage changes

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[datho7561]

I honestly have no idea if these integration tests (npm urn test-integration) are run anywhere. Most of the suite seems to be failing locally when I use an OpenShift Local (crc) instance.

[datho7561]

@msivasubramaniaan @rgrunber this PR is ready for review