[master]Fix for changing the OAS byte format from mapping byte[] to string in the Ballerina type

[lnash94]

Purpose

Fix ballerina-platform/ballerina-library#5072

As per the OAS specification byte format of the string type

byte – base64-encoded characters, for example, U3dhZ2dlciByb2Nrcw==

should map to the Ballerina string

Automation tests

• Unit tests - Added

  Code coverage information

• Integration tests

  Details about the test cases and coverage

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines? yes/no
• Ran FindSecurityBugs plugin and verified report? yes/no
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets? yes/no

Samples

Provide high-level details about the samples related to this feature

Related PRs

#1565

[ayeshLK]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (321ac86) 80.10% compared to head (92b2a2f) 80.10%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1566   +/-   ##
=========================================
  Coverage     80.10%   80.10%           
  Complexity     1854     1854           
=========================================
  Files           125      125           
  Lines         10323    10323           
  Branches       1704     1704           
=========================================
  Hits           8269     8269           
  Misses         1464     1464           
  Partials        590      590           

Files	Coverage Δ
.../io/ballerina/openapi/core/GeneratorConstants.java	92.03% <100.00%> (ø)

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[NipunaRanasinghe]

@lnash94 FYI #1565 (comment)

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication