chore: Bump OpenDAL to v0.20

[Xuanwo]

Signed-off-by: Xuanwo github@xuanwo.io

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

Bump OpenDAL to v0.20 for bug fixes and new features.

Read CHANGELOG for more details.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.

[codecov]

Codecov Report

Merging #569 (00e6413) into develop (f878827) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #569   +/-   ##
========================================
  Coverage    86.35%   86.36%           
========================================
  Files          398      398           
  Lines        50165    50165           
========================================
+ Hits         43322    43323    +1     
+ Misses        6843     6842    -1     

Flag	Coverage Δ
rust	86.36% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/object-store/src/lib.rs	100.00% <ø> (ø)
src/object-store/src/util.rs	100.00% <100.00%> (ø)
src/storage/src/manifest/storage.rs	98.03% <100.00%> (ø)
src/meta-srv/src/service/heartbeat.rs	86.31% <0.00%> (-1.06%)	⬇️
src/servers/src/mysql/writer.rs	75.21% <0.00%> (-0.86%)	⬇️
src/servers/src/error.rs	35.13% <0.00%> (+8.10%)	⬆️

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[evenyag]

LGTM. Thanks for your contribution!

[killme2008]

LGTM