G300 simulator enablement changes

[snisha-cisco]

Pre-submission checklist

• I've ran the linters locally and fixed lint errors related to the files I modified in this PR. You can install the linters by running pip install -r requirements-dev.txt && pre-commit install
• pre-commit run

Summary

The following changes enable simulator for G300 to run FBOSS tests

SAI / ASIC behavior

ACL

• MIRROR_EGRESS is programmed only on egress ACL tables for Tajo SDK >= 24.8.3001; ingress tables skip it.
• Tajo extra qualifier DST_MAC is not advertised as supported (commented out).
• getActionTypeList takes aclStage so action-type conversion is stage-aware.
• ACL entry extended label is emitted only when SAI_ACL_ENTRY_ATTR_EXT_LABEL_EXTENDED is defined.

Router interfaces / MPLS

• Port RIFs set AdminMplsState=true when HwAsic::Feature::MPLS is supported (previously VLAN RIFs only, hardcoded to Ebro/P200).
• Yuba ASIC advertises the MPLS feature.

Serdes / PFC / buffers (Yuba + G202x)

• Skip Tx FIR Post2 checks for Chenab and Yuba/G202x.
• PFC watchdog min intervals (200/400 ms) apply to Yuba/G202x as well as Chenab.
• Yuba MMU size updated.
• PFC tests use a dedicated egress pool instead of sharing the ingress pool size.
• Olympic WRR queues on G200/G202x attach a pool with reservedBytes so the SDK does not recompute reserve on every queue attach.

NSIM

• SDK_DEVICE_NAME overrides /dev/uio0 for the P200/Yuba/G202x connection handle.

IP-in-IP

• Expected IPv6 traffic class after decap: 0xF8 -> 0xFA (GR3 DSCP/TC mapping).

Test Plan

Necessary info has been provided to Meta.

[Santosh-KSingh]

Looks Good to me.