Pass MAVEN_PASSWORD as env var via taskspec

[rnc]

Due to https://www.github.com/tektoncd/pipeline/issues/8249 its not possible to mark the secret as optional in tekton so by removing it from the yaml this makes it easier to reuse that yaml for the pnc pipeline while keeping the env var for the CI

[codecov]

Codecov Report

Attention: Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 43.82%. Comparing base (cdd75ae) to head (acfe8dc).
Report is 19 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/reconciler/dependencybuild/dependencybuild.go	86.66%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2282      +/-   ##
============================================
+ Coverage     43.78%   43.82%   +0.04%     
+ Complexity      803      802       -1     
============================================
  Files           275      275              
  Lines         13250    13263      +13     
  Branches       1346     1346              
============================================
+ Hits           5802     5813      +11     
- Misses         6850     6851       +1     
- Partials        598      599       +1     

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