Bump hardhat-gas-reporter to v2 in gp2 external test

Author: r0qs

test/externalTests/gp2.sh

@@ -68,7 +68,8 @@ function gp2_test
     yarn
     # Hardhat 3.0+ breaks the test suite
     # v2.27.1 is the last v2 Hardhat (introduces Osaka support)
-    yarn add [email protected]
+    # hardhat-gas-reporter v2 is required for compatibility with our injected gas reporter settings
+    yarn add [email protected] hardhat-gas-reporter@^2
 
     # Ignore bench directory which fails to compile with current hardhat and ethers versions.
     # bench/trace/gas.ts:123:19 - error TS2339: Property 'equals' does not exist on type 'Uint8Array'.