Introduce types to t_complexity

[mpharrigan]

Everything is a bloq now, so we can indicate that with types in the t_complexity function. It will now duck-type for bloqs. There are some tests that still want to find the t complexity of things that contain bloqs, so I added a _compat version. I moved all the places where you literally need to get the TComplexity to a gate to explicit calls to _from_directly_countable (now with a _cirq suffix) so its more explicit where these values are coming from.

Depends on #825

[mpharrigan]

@tanujkhattar fyi, I still want to do this.

Current status

• need to add controlled-Y and controlled-H to get the tests to keep passing. I'll factor out the addition of these gates into their own pr.
• I hacked in a consideration for Controlled(ZGate()) but we really should have a native CZ lol
• For adding gates: I want to wait for Tensor Simulation protocol 2: keep indices factorized #1070 before adding tensors to the new gates to avoid merge conflicts

Getting things completely bloq-y will enable a seamless transition to the QECGatesCost cost

[mpharrigan]

This is ready for preliminary review, although I will continue testing things on my side.

[mpharrigan]

Ok, I called t_complexity on each bloq example before and after the change. They all match, except the following bloq examples used to error and now return values

223          SparseMatrix.explicit_matrix_block_encoding
224            SparseMatrix.sparse_matrix_block_encoding
225       SparseMatrix.sparse_matrix_symb_block_encoding
253    TextbookQPE.textbook_qpe_from_precision_and_delta
254    TextbookQPE.textbook_qpe_from_standard_deviati...
256                TextbookQPE.textbook_qpe_using_m_bits

[mpharrigan]

These ones used to cause errors and still do

16            AutoPartition.auto_partition
17     AutoPartition.auto_partition_unused
56                            ECAdd.ec_add
57                         ECAddR.ec_add_r
58                   ECAddR.ec_add_r_small
59                  ECPhaseEstimateR.ec_pe
60            ECPhaseEstimateR.ec_pe_small
61              ECWindowAddR.ec_window_add
63                   FindECCPrivateKey.ecc
103               MinusEffect.minus_effect
104                 MinusState.minus_state
105                         ModAdd.mod_add
123                   OneEffect.one_effect
124                     OneState.one_state
146                 PlusEffect.plus_effect
148                   PlusState.plus_state
170    Product.product_block_encoding_symb
272                 ZeroEffect.zero_effect
273                   ZeroState.zero_state

[mpharrigan]

@tanujkhattar can you ptal