Provide Docker Image for multiple Architectures

[nagyesta]

Issue: #1270

Description

• Update readme files to mention multi-arch images more prominently
• Implement new check in the LowkeyVaultContainer to recommend multi-arch images when it could be beneficial
• Add new tests

Entry point

Checklists

• I have rebased my branch
• My commit message is meaningful
• The commit messages use semantic versioning: {major}, {minor} or {patch}
• The changes are focusing on the issue at hand
• I have maintained or increased test coverage

Notes

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 98.83%. Comparing base (72f6e8a) to head (303e7a4).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...wkeyvault/testcontainers/LowkeyVaultContainer.java	92.30%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1324      +/-   ##
============================================
- Coverage     98.85%   98.83%   -0.02%     
- Complexity     2036     2041       +5     
============================================
  Files           239      239              
  Lines          4982     4994      +12     
  Branches        198      201       +3     
============================================
+ Hits           4925     4936      +11     
  Misses           43       43              
- Partials         14       15       +1     

Flag	Coverage Δ
app	99.32% <ø> (ø)
client	94.00% <ø> (ø)
testcontainers	95.81% <92.30%> (-0.25%)	⬇️

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