Enable Python debug port

[asavaritayal]

For VS Code to use /cc @nturinski @fiveisprime

[pragnagopa]

@ahmelsayed - I am working on updating the functions host to parse languageWorker.{language}.arguments instead of specifically looking for woker.{language}.Debug. This will allow CLI to pass other commandline options as well.
Instead of hard coding the debug ports, can we take that as an input? for example VS Code can pass the debug port to CLI

[ahmelsayed]

as mentioned on email, this is the syntax that vscode needs to pass in

# for node
func ... --language-worker -- "--inspect=<port>"
 
# for java
func ... --language-worker -- "<port>"
 
# for python
func ... --language-worker -- "<port>"

The CLI will have the following mapping:

{
    node: "languageWorkers:node:arguments={languageWorker}", // in this example {languageWorker} is "--inspect=<port>"
    java: "languageWorkers:java:debug={languageWorker}", // in this example {languageWorker} is "<port>"
    python: "languageWorkers:python:debug={languageWorker}" // in this example {languageWorker} is "<port>"
}

[ahmelsayed]

I have this PR for this change #546

Please let me know if the mapping above is correct and I'll merge it

[ahmelsayed]

@asavaritayal please make sure to follow up with vscode to pass the new parameters starting with beta.30

[pragnagopa]

@jdneo - Please see sample above for setting the debug port for java

[jdneo]

@pragnagopa Thanks for the information. So -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address={portnumber} will only has effect if user set FUNCTIONS_WORKER_RUNTIME to java in local.settings.json?