Add runtime APIs to call module init, start, stop and function invocations from a Ballerina project

[gabilang]

Purpose

$title

Fixes #42128

Approach

Describe how you are implementing the solutions along with the design details.

Samples

Runtime balRuntime = Runtime.from(new Module("orgName", "moduleName", "majorVersion"));
balRuntime.init();
balRuntime.start();
Object[] args = [];
balRuntime.invokeMethodAsync(“functionName”, args, callback);
balRuntime.stop(“org”, “module”, 1.0.0);

Remarks

List any other known issues, related PRs, TODO items, or any other notes related to the PR.

Check List

• [x] Read the Contributing Guide
• [ ] Updated Change Log
• [ ] Checked Tooling Support (#<Issue Number>)
• [ ] Added necessary tests
  • [ ] Unit Tests
  • [ ] Spec Conformance Tests
  • [x] Integration Tests
  • [ ] Ballerina By Example Tests
• [ ] Increased Test Coverage
• [ ] Added necessary documentation
  • [ ] API documentation
  • [ ] Module documentation in Module.md files
  • [ ] Ballerina By Examples

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 8.79121% with 83 lines in your changes are missing coverage. Please review.

Project coverage is 76.55%. Comparing base (572e01d) to head (85939a4). Report is 122 commits behind head on master.

Files	Patch %	Lines
...java/io/ballerina/runtime/internal/BalRuntime.java	7.27%	51 Missing :warning:
.../ballerina/runtime/internal/util/RuntimeUtils.java	0.00%	30 Missing :warning:
...rc/main/java/io/ballerina/runtime/api/Runtime.java	0.00%	2 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #42363      +/-   ##
============================================
- Coverage     76.56%   76.55%   -0.01%     
- Complexity    53422    53521      +99     
============================================
  Files          2902     2905       +3     
  Lines        201858   202259     +401     
  Branches      26271    26334      +63     
============================================
+ Hits         154547   154848     +301     
- Misses        38840    38924      +84     
- Partials       8471     8487      +16     

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[warunalakshitha]

@gabilang Shall we create an issue to investigate why code coverage is low even tests are covered?

[gabilang]

Will fix the code-coverage issue separately. Created a task for it https://github.com/ballerina-platform/ballerina-lang/issues/42427

[CLAassistant]

All committers have signed the CLA.