Add multiple output binding support

[xlight05]

Purpose

$Subject and minor fixes
Resolves ballerina-platform/module-ballerinax-azure.functions#586

TODO -
Disables few cosmosdb related fields as they are not supported for now - ballerina-platform/ballerina-library#7071

Minor Fixes and improvements -
Resolves ballerina-platform/module-ballerinax-azure.functions#594
Resolves ballerina-platform/module-ballerinax-azure.functions#591
Resolves ballerina-platform/module-ballerinax-azure.functions#590
Resolves ballerina-platform/module-ballerinax-azure.functions#589
Resolves ballerina-platform/module-ballerinax-azure.functions#588
Resolves ballerina-platform/module-ballerinax-azure.functions#587
Resolves ballerina-platform/module-ballerinax-azure.functions#562

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[codecov]

Codecov Report

Base: 70.81% // Head: 79.63% // Increases project coverage by +8.81% 🎉

Coverage data is based on head (fce0175) compared to base (a61545f).
Patch coverage: 83.89% of modified lines in pull request are covered.

❗ Current head fce0175 differs from pull request most recent head 93c8bf1. Consider uploading reports for the commit 93c8bf1 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master     ballerina-platform/module-ballerinax-azure.functions#603      +/-   ##
============================================
+ Coverage     70.81%   79.63%   +8.81%     
- Complexity      490      643     +153     
============================================
  Files            74       76       +2     
  Lines          2265     2499     +234     
  Branches        338      405      +67     
============================================
+ Hits           1604     1990     +386     
+ Misses          489      311     -178     
- Partials        172      198      +26     

Impacted Files	Coverage Δ
.../java/org/ballerinax/azurefunctions/Constants.java	0.00% <ø> (ø)
...org/ballerinax/azurefunctions/service/Binding.java	100.00% <ø> (+30.76%)	⬆️
...functions/exceptions/UnsupportedTypeException.java	0.00% <0.00%> (ø)
...lerinax/azurefunctions/AzureCodeGeneratedTask.java	93.75% <33.33%> (-4.03%)	⬇️
...ava/io/ballerina/stdlib/azure/functions/Utils.java	65.85% <50.00%> (-1.72%)	⬇️
.../main/java/org/ballerinax/azurefunctions/Util.java	77.35% <73.68%> (+0.88%)	⬆️
...ions/validators/output/OutputBindingValidator.java	79.56% <79.56%> (ø)
...zurefunctions/service/http/HTTPTriggerBinding.java	76.97% <83.33%> (+10.31%)	⬆️
...unctions/validators/http/HttpServiceValidator.java	81.42% <85.89%> (ø)
...erina/stdlib/azure/functions/FunctionCallback.java	83.07% <87.50%> (+3.47%)	⬆️
... and 35 more

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