fix: stop sr0 log lines from aks-log-collector.sh

[phealy]

What type of PR is this?
/kind bug

What this PR does / why we need it:
The aks-log-collector.sh script runs blkid to generate a listing of the available block devices in the system. Azure uses a virtual CD-ROM device to attach the initial provisioning data for the VM, but ejects the "CD" after it's been read by cloud-init. This means that when blkid runs and tries to see what's in the virtual CD-ROM drive, the kernel reports a series of errors to the kernel log and syslog:

[164138.178951] hv_storvsc f8b3781a-1e82-4818-a1c3-63d806ec15bb: tag#90 cmd 0x28 status: scsi 0x2 srb 0x84 hv 0xc0000001
[164138.178958] sr 0:0:0:2: [sr0] tag#90 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
[164138.178961] sr 0:0:0:2: [sr0] tag#90 Sense Key : Not Ready [current]
[164138.178963] sr 0:0:0:2: [sr0] tag#90 Add. Sense: Medium not present - tray open
[164138.178965] sr 0:0:0:2: [sr0] tag#90 CDB: Read(10) 28 00 00 00 00 02 00 00 02 00
[164138.178967] blk_update_request: I/O error, dev sr0, sector 8 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[164138.185025] Buffer I/O error on dev sr0, logical block 1, async page read

These errors are repeated hourly on all VMs to no purpose except for consuming disk and log space. This PR fixes this by modifying blkid to run on all block devices that do not match the sr* pattern, which excludes the virtual CD-ROM device.

Which issue(s) this PR fixes:

Fixes #

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

Release note:

AKS's log collection script will no longer trigger non-relevant errors about `/dev/sr0` to the kernel/system log every hour.

[djsly]

does the release note section actually help with the official AKS release note ?

[cameronmeissner]

thanks, this will be a big improvement