chore: Add the amqp extension to the buster images

[PROFeNoM]

Description

Adds the AMQP extension and its dependency in preparation of some future, upcoming work related to #2324

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.80%. Comparing base (ab52de5) to head (058aa74).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2970      +/-   ##
============================================
- Coverage     74.82%   74.80%   -0.02%     
  Complexity     2741     2741              
============================================
  Files           110      110              
  Lines         10863    10863              
============================================
- Hits           8128     8126       -2     
- Misses         2735     2737       +2     

Flag	Coverage Δ
tracer-php	74.80% <ø> (-0.02%)	⬇️

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see 1 file with indirect coverage changes

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[bwoebi]

Sounds good to me :-)