If excludeAfterRemap is enabled, the coverage stats become constant 100

## Environment

* **Version**: Node.js v18.14.2
* **Platform**: OSX 13.2.1 (Darwin macik.local 22.3.0 Darwin Kernel Version 22.3.0: Mon Jan 30 20:42:11 PST 2023; root:xnu-8792.81.3~2/RELEASE_X86_64 x86_64)

## Report Example

With no source file excluded:

❯ npx c8 report
-------------------------------------------------|---------|----------|---------|---------|-------------------
File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
-------------------------------------------------|---------|----------|---------|---------|-------------------
All files | 90.74 | 67.85 | 47.46 | 90.74 |
...s+wasm@2.8.0/node_modules/@hpcc-js/wasm/dist | 100 | 59.16 | 40.68 | 100 |
graphviz.js | 100 | 59.16 | 40.68 | 100 | 1
src | 98.4 | 100 | 100 | 98.4 |
bundled-engine.js | 100 | 100 | 100 | 100 |
graph.js | 100 | 100 | 100 | 100 |
renderer.js | 100 | 100 | 100 | 100 |
script-editor.js | 96.84 | 100 | 100 | 96.84 | 71-76
separate-engine.js | 100 | 100 | 100 | 100 |
src/codejar | 100 | 70 | 30 | 100 |
codejar.js | 100 | 70 | 30 | 100 | 4-17
src/prism | 83.56 | 78.72 | 59.25 | 83.56 |
prism-core.js | 78.75 | 73.13 | 68.42 | 78.75 | ...48-252,322-325
prism-graphviz.js | 100 | 100 | 100 | 100 |
prism-line-numbers.js | 98.19 | 86.66 | 75 | 98.19 | 147-149
prism-match-braces.js | 82.58 | 100 | 0 | 82.58 | ...53,57-61,65-75
-------------------------------------------------|---------|----------|---------|---------|-------------------
ERROR: Coverage for lines (90.74%) does not meet global threshold (100%)
ERROR: Coverage for functions (47.46%) does not meet global threshold (100%)
ERROR: Coverage for branches (67.85%) does not meet global threshold (100%)
ERROR: Coverage for statements (90.74%) does not meet global threshold (100%)

With `src/codejar` and `src/prism` excluded:

❯ npx c8 report -a
--------------------|---------|----------|---------|---------|-------------------
File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
--------------------|---------|----------|---------|---------|-------------------
All files | 100 | 100 | 100 | 100 |
bundled-engine.js | 100 | 100 | 100 | 100 |
graph.js | 100 | 100 | 100 | 100 |
renderer.js | 100 | 100 | 100 | 100 |
script-editor.js | 100 | 100 | 100 | 100 |
separate-engine.js | 100 | 100 | 100 | 100 |
--------------------|---------|----------|---------|---------|-------------------

Note the coverage of `script-editor.js` jumping from 96.84 to 100.

## Test Project

The repository https://github.com/prantlf/c8-ethernal-100 contains test coverage data and instructions how to reproduce the problem. The branch `c8-ethernal-100-coverage` of the original project (https://github.com/prantlf/graphviz-webcomponent/tree/c8-ethernal-100-coverage) can be use to run the test including the computation of the code coverage.