Update to go 1.18.5 and add docs for local setup with arm64

[johscheuer]

Description

Upgrading go to 1.18.5 to match upstream dependencies and adding some documentation steps for testing the operator locally.

Fixes: https://github.com/FoundationDB/fdb-kubernetes-operator/issues/1289

Type of change

Please select one of the options below.

• Other

Discussion

I will add in another PR how to run kind inside the container.

Testing

Locally + manually.

Documentation

Added.

Follow-up

[foundationdb-ci]

Result of fdb-kubernetes-operator-pr on Linux CentOS 7

• Commit ID: c30007f548cfe339b4e5af9ce52c535b5faff83e
• Duration 1:27:43
• Result: :x: FAILED
• Error: Error while executing command: make -C tests -kj prOperator. Reason: exit status 2
• Build Logs (available for 30 days)

[foundationdb-ci]

Result of fdb-kubernetes-operator-pr on Linux CentOS 7

• Commit ID: a262a9d54dcc6fd2c3874c25c04af5a7e792b4ff
• Duration 1:27:35
• Result: :x: FAILED
• Error: Error while executing command: make -C tests -kj prOperator. Reason: exit status 2
• Build Logs (available for 30 days)

[foundationdb-ci]

Result of fdb-kubernetes-operator-pr on Linux CentOS 7

• Commit ID: 4444d06d0da71de1fca90c538d5180a83cb515bb
• Duration 1:56:21
• Result: :white_check_mark: SUCCEEDED
• Error: N/A
• Build Logs (available for 30 days)
• Build Artifact (available for 30 days)