Update VPP Build to 2606-0.4

[AkeelAli]

• Includes July plugin/patch changes:

Commit	Date	Change
f7a79a6	Jul 17	sFlow per-port sample rate, direction, and VPP APIs (patches 0012-0014)
9adcd7e	Jul 21	Show per-port sampling-rate and per-thread skip in 'show sflow'
53a0712	Jul 31	Portchannel punt via sonic-ext plugin

Corresponding 2606-0.4 Debians uploaded to buildkite.

sonic-buildimage build and test passing: sonic-net/sonic-buildimage#28885

202605 backport validation

Back port request

• 202605

Tested branch

• 202605

Test result

• Validation PR: [validation][202605] VPP PortChannel punt for DHCP relay sonic-buildimage#29067 at 2e297e93668c2a791fba6a590befa8eb15bb5ca9
• Azure build: 1196355
• Environment: public sonic-mgmt 202605, t0-vpp, one KVM
• TestPlan: https://elastictest.org/scheduler/testplan/6a84bdd4e437251d82f52a1a
• Result: dhcp_relay/test_dhcp_relay.py::test_dhcp_relay_default[isc-relay-agent] passed. Module summary: 14 passed, 2 skipped; pretest: 9 passed, 3 skipped; posttest: 5 passed.

[mssonicbld]

/azp run

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[mssonicbld]

/azp run

[azure-pipelines]

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[mssonicbld]

The change is not in 202605 yet. @AkeelAli, please manually create the cherry pick PR for branch 202605.
You can ping the release branch owner(github account: vaibhavhd) to approve your cherry pick PR.
If this change is already in 202605, please comment "already in 202605". Thanks!

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