Make it possible to build the spectral image also on ARM

[Vad1mo]

Local image build for ARM CPU Architecture

This change makes it possible to build the spectra image not only for the x86 architecture but also for ARM.
This also updates SPECTRAL_VERSION to 6.11.1 because 6.1 does not provide binaries apart from x86.

The main problem this fix solves is that users can better develop and compile Harbor locally on ARM systems.

Issue being resolved

Fixes various issues on building and running Harbor locally on ARM
https://github.com/goharbor/harbor/issues?q=is%3Aissue+ARM

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.24%. Comparing base (b7b8847) to head (91c0b15).
Report is 233 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20506      +/-   ##
==========================================
- Coverage   67.56%   66.24%   -1.33%     
==========================================
  Files         991     1045      +54     
  Lines      109181   113489    +4308     
  Branches     2719     2845     +126     
==========================================
+ Hits        73768    75177    +1409     
- Misses      31449    34202    +2753     
- Partials     3964     4110     +146     

Flag	Coverage Δ
unittests	66.24% <ø> (-1.33%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 572 files with indirect coverage changes