Reflect decision to drop support for runtime-ballerina

[dgrove-oss]

See https://lists.apache.org/thread.html/r4a167da464d2313149f0955d47250124a5a88d0c0be98e925a956fba%40%3Cdev.openwhisk.apache.org%3E for decision thread.

[codecov-commenter]

Codecov Report

Merging #5164 (5d826dd) into master (eacbe1a) will increase coverage by 29.35%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #5164       +/-   ##
===========================================
+ Coverage   45.26%   74.62%   +29.35%     
===========================================
  Files         234      234               
  Lines       13382    13382               
  Branches      541      541               
===========================================
+ Hits         6058     9986     +3928     
+ Misses       7324     3396     -3928     

Impacted Files	Coverage Δ
...whisk/connector/kafka/KafkaProducerConnector.scala	55.00% <0.00%> (-32.50%)	⬇️
...whisk/connector/kafka/KafkaConsumerConnector.scala	59.15% <0.00%> (-22.54%)	⬇️
.../scala/org/apache/openwhisk/utils/Exceptions.scala	20.00% <0.00%> (-20.00%)	⬇️
...a/org/apache/openwhisk/http/BasicHttpService.scala	79.36% <0.00%> (-11.12%)	⬇️
...pache/openwhisk/core/entity/ConcurrencyLimit.scala	88.23% <0.00%> (-5.89%)	⬇️
...pache/openwhisk/core/containerpool/Container.scala	85.05% <0.00%> (-5.75%)	⬇️
...sk/core/containerpool/docker/DockerContainer.scala	87.91% <0.00%> (-4.40%)	⬇️
...pache/openwhisk/core/invoker/InvokerReactive.scala	57.75% <0.00%> (-1.73%)	⬇️
...tainerpool/docker/DockerClientWithFileAccess.scala	92.00% <0.00%> (ø)
...ntainerpool/v2/FunctionPullingContainerProxy.scala	78.12% <0.00%> (+0.34%)	⬆️
... and 130 more

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