Fix rapidcheck

[yingyee0111]

Description of changes:
Enabled rapidcheck in opattrs

• editted toml files
• wrote custom arbitrary() for stack_vector, optional, variant, DimOrdered
• wrote rc::checks to test rc::gen::arbitrary() for custom types
• enabled rapidcheck for variant.toml specs, see notes below

NOTES

• PR for proj repo should be merged in before this to recognize rapidcheck for variant specs.

Related Issues:

Linked Issues:

• Issue #

Issues closed by this PR:

• Closes #

Before merging:

• Did you update the flexflow-third-party repo, if modifying any of the Cmake files, the build configs, or the submodules?

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This change is 

[lockshaw]

Reviewed 103 of 103 files at r1, all commit messages.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @yingyee0111)

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lib/op-attrs/include/op-attrs/operator_attrs.h line 34 at r1 (raw file):

#include "ops/topk.h"
#include "ops/transpose.h"
#include "utils/record_formatter.h"

Why?

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lib/op-attrs/src/op-attrs/ff_dim.dtg.cc line 59 at r1 (raw file):

namespace rc {
Gen<FlexFlow::ff_dim_t> Arbitrary<FlexFlow::ff_dim_t>::arbitrary() {
  return gen::construct<FlexFlow::ff_dim_t>(gen::arbitrary<int>());

Should probably be constrained by MAX_TENSOR_DIM

[lockshaw]

Reviewed 81 of 81 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @yingyee0111)

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lib/op-attrs/src/op-attrs/computation_graph_op_attrs.dtg.cc line 404 at r2 (raw file):

                    gen::cast<::FlexFlow::ComputationGraphOpAttrs>(
                        gen::arbitrary<::FlexFlow::DropoutAttrs>()),
                    gen::cast<::FlexFlow::ComputationGraphOpAttrs>(

Why cast instead of construct?