feat: Replace copyright header with SPDX identifier

[kimbor]

Description:
-Replace all copyright headers with SPDX identifiers. This is a requirement before migration to Linux Foundation repo. See here for description of SPDX
-Update spotless to use new header

IMPORTANT: This PR touches nearly every file in the hedera-services repo. That means that it will cause conflicts with all open PRs. To fix the conflict in your local branch, run spotlessApply.

Related issue(s):
Fixes #17796

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.01% (target: -1.00%)	∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (91492a1)	99096	72252	72.91%
Head commit (c914977)	99096 (+0)	72247 (-5)	72.91% (-0.01%)

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 (#17801)	0	0	∅ (not applicable)

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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_{Codacy stopped sending the deprecated coverage status on June 5th, 2024. Learn more}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.98%. Comparing base (91492a1) to head (c914977).

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #17801      +/-   ##
============================================
- Coverage     68.99%   68.98%   -0.01%     
+ Complexity    22952    22929      -23     
============================================
  Files          2646     2646              
  Lines         99313    99326      +13     
  Branches      10253    10252       -1     
============================================
  Hits          68521    68521              
- Misses        26909    26925      +16     
+ Partials       3883     3880       -3     

Files with missing lines	Coverage Δ
.../src/main/java/com/hedera/hapi/util/HapiUtils.java	59.11% <ø> (ø)
...m/hedera/hapi/util/UnknownHederaFunctionality.java	100.00% <ø> (ø)
.../node/app/hapi/fees/calc/OverflowCheckingCalc.java	98.38% <ø> (ø)
...edera/node/app/hapi/fees/pricing/AssetsLoader.java	100.00% <ø> (ø)
...node/app/hapi/fees/pricing/BaseOperationUsage.java	98.85% <ø> (ø)
...edera/node/app/hapi/fees/pricing/FeeSchedules.java	100.00% <ø> (ø)
...node/app/hapi/fees/pricing/RequiredPriceTypes.java	100.00% <ø> (ø)
...a/node/app/hapi/fees/pricing/ResourceProvider.java	100.00% <ø> (ø)
.../node/app/hapi/fees/pricing/ScheduleGenerator.java	100.00% <ø> (ø)
...era/node/app/hapi/fees/pricing/UsableResource.java	100.00% <ø> (ø)
... and 16 more

... and 2620 files with indirect coverage changes