fluent bit: Add support for outbound http proxy

[SanyaKochhar]

Description: Adds support for outbound proxy with Fluent Bit. Updates Fluent Bit to v1.6.4.

Affected area:

• New Functionality [x]
• Documentation [x]
• Install [ ]
• Control Plane [ ]
• CLI Tool [ ]
• Certificate Management [ ]
• Networking [ ]
• Metrics [ ]
• SMI Policy [ ]
• Security [ ]
• Tests [ ]
• CI System [ ]
• Performance [ ]
• Other [ ]

Please answer the following questions with yes/no.

• Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution?
  no, no

[codecov-io]

Codecov Report

Merging #2114 (bdf3788) into main (d12f43b) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #2114      +/-   ##
==========================================
+ Coverage   58.67%   58.69%   +0.01%     
==========================================
  Files         144      144              
  Lines        5936     5936              
==========================================
+ Hits         3483     3484       +1     
+ Misses       2450     2449       -1     
  Partials        3        3              

Impacted Files	Coverage Δ
cmd/cli/dashboard.go	0.00% <0.00%> (ø)
cmd/cli/proxy_configdump.go	4.54% <0.00%> (ø)
pkg/kubernetes/portforward.go	0.00% <ø> (ø)
pkg/envoy/route/config.go	96.03% <0.00%> (+0.79%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fc87610...bdf3788. Read the comment docs.

[ritazh]

lgtm

[michelleN]

Thanks @SanyaKochhar ! Is there an e2e test scenario that validates the fluentbit integration somewhere?

[SanyaKochhar]

Thanks @SanyaKochhar ! Is there an e2e test scenario that validates the fluentbit integration somewhere?

@michelleN There's this e2e for fluentbit integration https://github.com/openservicemesh/osm/blob/main/tests/e2e/e2e_fluentbit_test.go - but it doesn't test changes made in this PR

[nshankar13]

lgtm