Reintroduce UPGRADE_NO_OP in deployment.yaml

[acohen4]

Reintroduce UPGRADE_NO_OP env-var to ease 'helm upgrade' auto-restarting pods to consume new secrets. This is a stop gap until we migrate secrets to volumes, and watch their inodes to restart

[codecov]

Codecov Report

Merging #8113 (ce701e2) into master (dd4b95b) will increase coverage by 20.62%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #8113       +/-   ##
===========================================
+ Coverage    1.66%   22.28%   +20.62%     
===========================================
  Files         172      424      +252     
  Lines       70883   112020    +41137     
===========================================
+ Hits         1182    24969    +23787     
- Misses      69601    82768    +13167     
- Partials      100     4283     +4183     

Impacted Files	Coverage Δ
src/internal/pfsload/client.go	100.00% <0.00%> (ø)
src/internal/pachd/s3.go	0.00% <0.00%> (ø)
src/server/pfs/server/commit_store.go	79.13% <0.00%> (ø)
src/internal/storage/fileset/metadata_store.go	100.00% <0.00%> (ø)
src/server/auth/server/util.go	0.00% <0.00%> (ø)
src/internal/storage/fileset/util.go	80.45% <0.00%> (ø)
src/server/auth/server/oidc.go	0.00% <0.00%> (ø)
src/internal/pfsload/worker.go	65.21% <0.00%> (ø)
src/server/pfs/fuse/server.go	0.00% <0.00%> (ø)
src/server/identity/server/dex_api.go	83.01% <0.00%> (ø)
... and 378 more

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