Remove support of RequestUnitsDeprecated::additional_fee when prioritization_fee_type_change feature is activated

[tao-stones]

Problem

Concern raised here.

Proposed Solution

remove support of RequestUnitsDeprecated::additional_fee when feature prioritization_fee_type_change is activated

[jstarry]

The concern I raised in #25178 has been resolved for now, but I think we should still eventually deprecate this instruction

[tao-stones]

feature add_set_compute_unit_price (early was called prioritization_fee_type_change) had been activated in all cluster:

solana feature status 98std1NSHqXi9WYvFShfVepRdCoq1qvsp8fsR2XZtG8g -ut
Feature                                      | Status                  | Activation Slot | Description
98std1NSHqXi9WYvFShfVepRdCoq1qvsp8fsR2XZtG8g | active since epoch 332  | 137900256       | add compute budget ix for setting a compute unit price

solana feature status 98std1NSHqXi9WYvFShfVepRdCoq1qvsp8fsR2XZtG8g -ud
Feature                                      | Status                  | Activation Slot | Description
98std1NSHqXi9WYvFShfVepRdCoq1qvsp8fsR2XZtG8g | active since epoch 332  | 143424000       | add compute budget ix for setting a compute unit price

solana feature status 98std1NSHqXi9WYvFShfVepRdCoq1qvsp8fsR2XZtG8g -um
Feature                                      | Status                  | Activation Slot | Description
98std1NSHqXi9WYvFShfVepRdCoq1qvsp8fsR2XZtG8g | active since epoch 329  | 142128000       | add compute budget ix for setting a compute unit price

The deprecated instruction is still being used in MNB, example.

[tao-stones]

feature gate to remove deprecated ix has been scheduled and is pending. Close this Issue, tracing removal at #27500