unixpb: Add Xcode11 installation tasks to Unix playbook

[Haroon-Khel]

• commit message has one of the standard prefixes
• faq.md updated if appropriate
• other documentation is changed or added (if applicable)
• playbook changes run through VPC or QPC (if you have access)
• VPC/QPC not applicable for this PR
• for inventory.yml changes, bastillion/nagios/jenkins updated accordingly

ref #2536

Xcode11.7 is required on m1 mac machines in order to cross compile x64 jdk8

Our usual method of installing xcode using xcversion is no longer supported https://github.com/xcpretty/xcode-install/blob/master/MIGRATION.md and is causing errors when I use it to install xcode11.7, see #2536 (comment)

xcodes is another tool used to install different versions of xcode but I think it is dependent on Xcode13 which I believe requires macOS 11.3+ (our M1 machines are 11.0)

[sxa]

We would ideally want to ensure that if the vendor_files is not available then this does not cause a playbook failure (other people using our playbooks may not have it available). We should have some way to trap this (May be telling people to use a skip-tags option for the role telling people to install it manually, or just warning and continuing. Or maybe we should abort if the adoptopenjdk tag is not skipped)

[Haroon-Khel]

The transfer process takes around 40mins. The binary is 7.6G.

And this may be due to timeout reasons, but after the transfer is complete ansible hangs. It hung for about 30mins before I interrupted the execution. I'll test to see if AWX shows the same behaviour

[Haroon-Khel]

Awx run https://awx2.adoptopenjdk.net/#/jobs/playbook/1916?job_search=page_size:20;order_by:-finished;not__launch_type:sync

[Haroon-Khel]

Tested this pr on test-macstadium-macos11-arm64-1. Works as expected

[Haroon-Khel]

Running from AWX, the transfer takes the same time as running it from my machine, around 40mins. I dont think this is too bad as we are not seeing timeout errors

[Haroon-Khel]

I've rolled out xcode11.7 onto the 4 arm64 mac machines

[sxa]

Running from AWX, the transfer takes the same time as running it from my machine, around 40mins. I dont think this is too bad as we are not seeing timeout errors

Yeah that's fine since it's a one off and won't happen on subsequent runs of the playbook :-)

[gdams]

I'm going to go ahead and push this as it's blocking my Orka review