Implement some GDScript benchmarks

[guilhermevfa]

Implements

🟪Algorithm🟪 [Simple for loop add]: GDscript: Run 1,000,000 iterations of a for loop adding a number.
🟪Algorithm🟪 [Simple for loop call]: GDScript: Run 1,000,000 iterations calling a function.
🟪Algorithm🟪 [Lambda performance]: GDscript: Make a simple lambda function and call it 1000 times.

from GDScript section in #36 benchmarks list.

[Calinou]

Tested locally, it works as expected. Execution time for all benchmarks is around 50 ms on an i9-13900K.

Execution time for Lambda performance is however very low (0.3 ms). We should probably do 10,000 calls of the lambda if not more.

[guilhermevfa]

Changed to 1,000,000 lambda calls. I see no reason to keep it different from the number of regular function calls.