fix: HIP-904 Additional e2e test cases where receiver contract and already associated

[stoyanov-st]

Description:

• This PR adds additional test cases for Token Airdrop via smart contract where the receiving account is a contract that is already associated with the Airdropped token/s.
• This PR also enables Contract entities to receive Airdrops.
• Adds maxAutoAssociations to the Contract annotation.

Related issue(s):

Fixes #16240
Fixes #16241
Fixes #16242
Fixes #16243
Fixes #16244
Fixes #16245
Fixes #16246

Notes for reviewer:
This branch is based on #16216 to include the helper methods for the airdrop tests

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 63.39%. Comparing base (5cd5714) to head (e41b223).
Report is 39 commits behind head on develop.

Files with missing lines	Patch %	Lines
...rvice/token/impl/handlers/TokenAirdropHandler.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #16399      +/-   ##
=============================================
+ Coverage      63.36%   63.39%   +0.02%     
- Complexity     20162    20194      +32     
=============================================
  Files           2533     2538       +5     
  Lines          94097    94261     +164     
  Branches        9844     9873      +29     
=============================================
+ Hits           59625    59755     +130     
- Misses         30855    30903      +48     
+ Partials        3617     3603      -14     

Files with missing lines	Coverage Δ
...rvice/token/impl/handlers/TokenAirdropHandler.java	84.64% <0.00%> (ø)

... and 81 files with indirect coverage changes

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• Flaky Tests Detection - Detect and resolve failed and flaky tests

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.03% (target: -1.00%)	✅ 0.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (5cd5714)	96916	63104	65.11%
Head commit (e41b223)	96877 (-39)	63054 (-50)	65.09% (-0.03%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#16399)	1	0	0.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[github-actions]

Node: HAPI Test (Restart) Results

7 tests   2 ✅  3m 35s ⏱️
8 suites  0 💤
9 files    5 ❌
1 errors

For more details on these parsing errors and failures, see this check.

Results for commit e554bb2.

[lukelee-sl]

LGTM. tyvm!

[Neeharika-Sompalli]

LGTM! Thanks @stoyanov-st