remove `--nobuild` from build performance example
remove `--nobuild` from build performance example

It's a bit contradictory to not run the build when analyzing the performance of the build, and I found it a bit confusing at first because running
```
$ bazel build --nobuild --profile=/tmp/prof //source/exe:envoy-static`
```
basically just starts Bazel, resolves the target, and exits Bazel, as reflected in the performance analysis:
```
=== PHASE SUMMARY INFORMATION ===

Total launch phase time         0.057 s    0.55%
Total init phase time           0.060 s    0.58%
Total loading phase time        0.131 s    1.26%
Total analysis phase time      10.183 s   97.61%
Total finish phase time         0.000 s    0.01%
------------------------------------------------
Total run time                 10.433 s  100.00%

Critical path (0.00 ms):
```

There isn't even an execution phase like the example has

Closes #11499.

PiperOrigin-RevId: 313345926

cushon/bazel,twitter-forks/bazel,ulfjack/bazel,werkt/bazel,werkt/bazel,werkt/bazel,katre/bazel,cushon/bazel,katre/bazel,katre/bazel,twitter-forks/bazel,meteorcloudy/bazel,ulfjack/bazel,perezd/bazel,twitter-forks/bazel,meteorcloudy/bazel,meteorcloudy/bazel,perezd/bazel,werkt/bazel,perezd/bazel,ulfjack/bazel,davidzchen/bazel,werkt/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,davidzchen/bazel,ButterflyNetwork/bazel,cushon/bazel,meteorcloudy/bazel,ulfjack/bazel,perezd/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,davidzchen/bazel,safarmer/bazel,meteorcloudy/bazel,bazelbuild/bazel,katre/bazel,ButterflyNetwork/bazel,cushon/bazel,davidzchen/bazel,katre/bazel,safarmer/bazel,werkt/bazel,perezd/bazel,twitter-forks/bazel,davidzchen/bazel,safarmer/bazel,ButterflyNetwork/bazel,perezd/bazel,twitter-forks/bazel,katre/bazel,bazelbuild/bazel,meteorcloudy/bazel,safarmer/bazel,bazelbuild/bazel,cushon/bazel,ulfjack/bazel,ulfjack/bazel,bazelbuild/bazel,perezd/bazel,meteorcloudy/bazel,safarmer/bazel,twitter-forks/bazel,davidzchen/bazel,safarmer/bazel,ulfjack/bazel,davidzchen/bazel,cushon/bazel