support vci serverless

[zwwhdls]

1. when in serverless environment, do not mount hostPath except mount point. Set juicefs.com/enable-serverless-injection: "true" in namespace to use.
2. support VCI serverless. Set juicefs.com/enable-serverless-injection: "true" in namespace and vke.volcengine.com/burst-to-vci: enfore in pod to use.
   • do not mount hostPath
   • container is not privileged
   • no propagationBidirectional mountPropagation
   • no initContainer
   • with env JFS_NO_UMOUNT=1
   • annotations for VCI

[codecov-commenter]

Codecov Report

Attention: 354 lines in your changes are missing coverage. Please review.

Comparison is base (eb067a3) 37.99% compared to head (9992903) 36.62%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #753      +/-   ##
==========================================
- Coverage   37.99%   36.62%   -1.37%     
==========================================
  Files          34       36       +2     
  Lines        4135     4306     +171     
==========================================
+ Hits         1571     1577       +6     
- Misses       2412     2582     +170     
+ Partials      152      147       -5     

Files	Coverage Δ
pkg/juicefs/mount/builder/secret.go	0.00% <ø> (ø)
pkg/util/util.go	32.82% <100.00%> (+0.68%)	⬆️
pkg/driver/controller.go	60.00% <0.00%> (-0.84%)	⬇️
pkg/juicefs/mount/pod_mount.go	34.44% <25.00%> (ø)
pkg/driver/provisioner.go	8.59% <0.00%> (-0.35%)	⬇️
pkg/juicefs/mount/builder/job.go	0.00% <0.00%> (ø)
pkg/webhook/handler/mutate/sidecar.go	20.49% <19.23%> (-4.51%)	⬇️
pkg/juicefs/mount/builder/pod.go	63.63% <59.00%> (+10.69%)	⬆️
pkg/juicefs/mount/builder/common.go	58.75% <67.66%> (+11.49%)	⬆️
pkg/juicefs/mount/builder/container.go	0.00% <0.00%> (ø)
... and 2 more

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Hexilee]

LGTM