Bump SALT packages to 3006.9 in provision_salt.sh

[christopherfujino]

Part of flutter/flutter#157963

For context: https://saltproject.io/blog/salt-project-package-repo-migration-and-guidance/

[christopherfujino]

@cbracken could you PTAL, bdero is OOO.

[cbracken]

[christopherfujino]

Gonna actually run this on sample devicelab bots to verify before merging.

[christopherfujino]

I am going to run this script on:

• flutter-devicelab-linux-14 (staging pool, with a mokey attached)
• flutter-devicelab-mac-10 (intel host arch, with an iphone 12 attached)

To verify that it works.

[christopherfujino]

I am going to run this script on:

• flutter-devicelab-linux-14 (staging pool, with a mokey attached)
• flutter-devicelab-mac-10 (intel host arch, with an iphone 12 attached)

To verify that it works.

Running this on ubuntu failed because the *.deb package we download is for package salt-api, but that depends on salt-master, which isn't installed. also, the version of salt-api/salt-master in the ubuntu repos is for version 3006.9, which I don't think we can use.

I got the script to succeed on macOS, but had to make some changes to the script:

• The curl command needed the -L flag, and in function set_deviceos_grains() I needed to add /usr/local/sbin to the PATH first.

[christopherfujino]

Running sudo salt-call state.apply failed to compile the native C parts of the m2crypto python pip package. I got around this by running sudo /opt/salt/bin/pip install m2crypto ¯_(ツ)_/¯