feat: Add persistent shard and realm support to Client

[0xivanov]

Description:
Adds persistent realm and shard according to hiero-ledger/sdk-collaboration-hub#28

New APIs

• ClientForNetworkV2 : extracts the shard and realm from the network map and persists it
• GetShard
• GetRealm

Updated APIs

• ClientFromConfig : can now accept shard and realm into the json schema

Deprecation notice

• ClientForMirrorNetworkWithRealmAndShard : Use ClientForMirrorNetworkWithShardAndRealm instead.
• ClientForNetwork : Use ClientForNetworkV2 instead.

Related issue(s):

Fixes #1404

Notes for reviewer:

Checklist

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

[lfdt-bot]

🎉 Snyk checks have passed. No issues have been found so far.

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[codecov]

Codecov Report

Attention: Patch coverage is 77.58621% with 13 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
sdk/client.go	76.36%	12 Missing and 1 partial ⚠️

Files with missing lines	Coverage Δ
sdk/file_id.go	77.86% <100.00%> (ø)
sdk/client.go	65.37% <76.36%> (+0.13%)	⬆️

... and 10 files with indirect coverage changes

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[lfdt-bot]

🎉 Snyk checks have passed. No issues have been found so far.

✅ security/snyk check is complete. No issues have been found. (View Details)

[gsstoykov]

LGTM