Fix handling metadata values in the query API

[Nuvindu]

Purpose

Fixes: ballerina-platform/ballerina-library#8238, ballerina-platform/ballerina-library#8239

This PR fixes the followings,

• Fix handling metadata values in the query API
• Added v1 at the end of the service url path
• Use TextChunks as the type for chunks returned from the query results

[codecov]

Codecov Report

❌ Patch coverage is 93.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.63%. Comparing base (443292b) to head (8943b31).
⚠️ Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
ballerina/utils.bal	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
+ Coverage   61.98%   69.63%   +7.64%     
==========================================
  Files           2        2              
  Lines         171      191      +20     
  Branches       63       68       +5     
==========================================
+ Hits          106      133      +27     
+ Misses         65       58       -7     

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