Fix some isolated test scenarios

Author: antico5

v-next/hardhat/test/internal/builtin-plugins/solidity/build-system/partial-compilation/from-scratch-three-files-A-B,C.ts

@@ -141,7 +141,7 @@ describe("Partial compilation", () => {
         assert.ok(firstSnapshot.typeFiles["Bar.sol"] !== undefined);
 
         // Recompile
-        await project.compile();
+        await project.compile({ isolated: true });
         const secondSnapshot = await project.getSnapshot();
 
         // Nothing in the snapshot should have changed

v-next/hardhat/test/internal/builtin-plugins/solidity/build-system/partial-compilation/from-scratch-three-files-A-B--C.ts

@@ -145,7 +145,7 @@ describe("Partial compilation", () => {
         assert.ok(firstSnapshot.typeFiles["FooFactory.sol"] !== undefined);
 
         // Recompile
-        await project.compile();
+        await project.compile({ isolated: true });
         const secondSnapshot = await project.getSnapshot();
 
         // Nothing in the snapshot should have changed

v-next/hardhat/test/internal/builtin-plugins/solidity/build-system/partial-compilation/from-scratch-three-files-A-B-C.ts

@@ -141,7 +141,7 @@ describe("Partial compilation", () => {
         assert.ok(firstSnapshot.typeFiles["IFoo.sol"] !== undefined);
 
         // Recompile
-        await project.compile();
+        await project.compile({ isolated: true });
         const secondSnapshot = await project.getSnapshot();
 
         // Nothing in the snapshot should have changed

v-next/hardhat/test/internal/builtin-plugins/solidity/build-system/partial-compilation/from-scratch-two-connected-files.ts

@@ -120,7 +120,7 @@ describe("Partial compilation", () => {
         assert.ok(firstSnapshot.typeFiles["IFoo.sol"] !== undefined);
 
         // Recompile
-        await project.compile();
+        await project.compile({ isolated: true });
         const secondSnapshot = await project.getSnapshot();
 
         // Nothing in the snapshot should have changed

v-next/hardhat/test/internal/builtin-plugins/solidity/build-system/partial-compilation/from-scratch-two-indept-files.ts

@@ -119,7 +119,7 @@ describe("Partial compilation", () => {
         assert.ok(firstSnapshot.typeFiles["B.sol"] !== undefined);
 
         // Recompile
-        await project.compile();
+        await project.compile({ isolated: true });
 
         const secondSnapshot = await project.getSnapshot();