feat: get secrets by versionId or versionStage (#19)

[ThirdEyeSqueegee]

Issue #, if available:
#19

Description of changes:

• Add optional versionId and versionStage args to GetSecretString and GetSecretBinary to allow retrieving secrets by version ID or version stage

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

❌ Patch coverage is 72.41379% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.65%. Comparing base (db8a853) to head (36a08ac).

Files with missing lines	Patch %	Lines
.../secretsmanager/caching/cache/SecretCacheItem.java	52.94%	5 Missing and 3 partials ⚠️

Additional details and impacted files

@@ Coverage Diff @@## v2 #153 +/- ##
============================================
- Coverage 90.86% 87.65% -3.22% - Complexity 90 93 +3 
============================================
Files 6 6 Lines 230 243 +13 Branches 24 29 +5 ============================================
+ Hits 209 213 +4 - Misses 18 24 +6 - Partials 3 6 +3 

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