ci(NODE-7496): pin npm to 11.11.1 for Node 20 and 22 build variants

Author: tadjik1

.evergreen/config.yml

@@ -3520,6 +3520,7 @@ buildvariants:
     run_on: rhel80-large
     expansions:
       NODE_LTS_VERSION: 20.19.0
+      NPM_VERSION: 11.11.1
       CLIENT_ENCRYPTION: 'true'
       TEST_CSFLE: 'true'
     tasks:
@@ -3575,6 +3576,7 @@ buildvariants:
     run_on: rhel80-large
     expansions:
       NODE_LTS_VERSION: 22
+      NPM_VERSION: 11.11.1
       CLIENT_ENCRYPTION: 'true'
       TEST_CSFLE: 'true'
     tasks:
@@ -3738,6 +3740,7 @@ buildvariants:
     run_on: windows-2022-latest-large
     expansions:
       NODE_LTS_VERSION: 20.19.0
+      NPM_VERSION: 11.11.1
       CLIENT_ENCRYPTION: 'false'
       TEST_CSFLE: 'false'
     tasks:
@@ -3782,6 +3785,7 @@ buildvariants:
     run_on: windows-2022-latest-large
     expansions:
       NODE_LTS_VERSION: 22
+      NPM_VERSION: 11.11.1
       CLIENT_ENCRYPTION: 'false'
       TEST_CSFLE: 'false'
     tasks:

.evergreen/generate_evergreen_tasks.js

@@ -397,6 +397,13 @@ for (const {
     const expansions = { NODE_LTS_VERSION };
     const taskNames = tasks.map(({ name }) => name);
 
+    // bundled npm version in node 20 (v10.8.x) and in node 22 (v10.9.x) can't upgrade to latest 11.12,
+    // so we need to pin npm version for these variants to latest "upgradable" version
+    const major = parseInt(NODE_LTS_VERSION, 10);
+    if (major < 24) {
+      expansions.NPM_VERSION = '11.11.1';
+    }
+
     expansions.CLIENT_ENCRYPTION = String(!!clientEncryption);
     expansions.TEST_CSFLE = expansions.CLIENT_ENCRYPTION;