fix(js): update detection of ts solution setup (#29576)

Since we simplified `tsconfig.base.json`'s `compilerOptions` to not
include values that match defaults (as per Jake's feedback), the logic
to detect TS solution setup should check that `declaration` is
explicitly set to `false`, rather than that it is falsy.

Clean up PR: #29550

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## Current Behavior
<!-- This is the behavior we have today -->
We're not detecting TS solution setup correctly

## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR
-->
Detection works

## Related Issue(s)
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merged. -->

Fixes #

(cherry picked from commit cbfc6fe)

Author: jaysoo

packages/js/src/plugins/typescript/plugin.spec.ts

@@ -2905,7 +2905,6 @@ describe(`Plugin: ${PLUGIN_NAME}`, () => {
                     },
                     "outputs": [
                       "{workspaceRoot}/dist/libs/my-lib",
-                      "{workspaceRoot}/dist/libs/*.tsbuildinfo",
                     ],
                     "syncGenerators": [
                       "@nx/js:typescript-sync",
@@ -3066,7 +3065,6 @@ describe(`Plugin: ${PLUGIN_NAME}`, () => {
                       "{workspaceRoot}/dist/libs/my-lib/lib.d.ts.map",
                       "{workspaceRoot}/dist/libs/my-lib/lib.tsbuildinfo",
                       "{workspaceRoot}/dist/libs/my-lib/other",
-                      "{workspaceRoot}/dist/libs/my-lib/*.tsbuildinfo",
                     ],
                     "syncGenerators": [
                       "@nx/js:typescript-sync",

packages/js/src/utils/typescript/ts-solution-setup.ts

@@ -62,7 +62,7 @@ function isWorkspaceSetupWithTsSolution(tree: Tree): boolean {
   if (
     !baseTsconfigJson.compilerOptions ||
     !baseTsconfigJson.compilerOptions.composite ||
-    !baseTsconfigJson.compilerOptions.declaration
+    baseTsconfigJson.compilerOptions.declaration === false
   ) {
     return false;
   }