Move gh-repository location in bench-trend workflow

[mothran]

Moves the gh-repo clone location to runner.temp to prevent. Depends on the following PR to be merged to risc0 branch:
risc0/github-action-benchmark#2

[github-actions]

Benchmark for Linux-cuda c1ecf17

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	1468.5±58.83ms	1460.0±34.01ms	-0.58%
fib/100/run	334.7±1.98ms	333.6±2.27ms	-0.33%
fib/200/proof	1617.9±147.72ms	1472.4±32.87ms	-8.99%
fib/200/run	336.4±1.80ms	333.7±2.44ms	-0.80%

Benchmark for Linux-default c1ecf17

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	6.2±0.05s	6.2±0.05s	0.00%
fib/100/run	1448.7±3.73ms	1442.8±3.24ms	-0.41%
fib/200/proof	6.2±0.03s	6.2±0.03s	0.00%
fib/200/run	1464.7±15.88ms	1445.1±2.83ms	-1.34%

Benchmark for macOS-default c1ecf17

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	3.9±0.06s	3.9±0.04s	0.00%
fib/100/run	692.4±1.57ms	692.1±1.13ms	-0.04%
fib/200/proof	3.9±0.06s	3.9±0.05s	0.00%
fib/200/run	695.4±1.33ms	695.0±1.81ms	-0.06%

Benchmark for macOS-metal c1ecf17

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	1481.4±5.32ms	1479.3±7.46ms	-0.14%
fib/100/run	692.5±3.47ms	691.9±1.76ms	-0.09%
fib/200/proof	1487.7±6.19ms	1484.8±5.97ms	-0.19%
fib/200/run	694.6±1.10ms	694.3±1.58ms	-0.04%

[github-actions]

Benchmark for Linux-cuda 546898f

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	1877.8±72.31ms	1734.2±157.81ms	-7.65%
fib/100/run	440.3±5.38ms	430.9±5.78ms	-2.13%
fib/200/proof	1886.4±70.95ms	1857.2±75.85ms	-1.55%
fib/200/run	445.8±6.71ms	442.5±10.81ms	-0.74%

Benchmark for Linux-default 546898f

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	6.3±0.06s	6.2±0.06s	-1.59%
fib/100/run	1457.4±16.07ms	1453.5±1.81ms	-0.27%
fib/200/proof	6.2±0.07s	6.2±0.02s	0.00%
fib/200/run	1473.3±14.00ms	1465.5±4.63ms	-0.53%

Benchmark for macOS-default 546898f

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	3.9±0.05s	3.9±0.04s	0.00%
fib/100/run	691.4±1.34ms	691.2±0.92ms	-0.03%
fib/200/proof	3.9±0.06s	3.9±0.03s	0.00%
fib/200/run	694.7±1.44ms	694.4±1.48ms	-0.04%

Benchmark for macOS-metal 546898f

Click to hide benchmark

Test	Base	PR	%
fib/100/proof	1482.1±6.00ms	1481.9±6.84ms	-0.01%
fib/100/run	693.1±3.40ms	692.2±1.09ms	-0.13%
fib/200/proof	1489.4±3.57ms	1487.2±13.26ms	-0.15%
fib/200/run	694.9±0.62ms	694.7±1.76ms	-0.03%