cram/async/io/writer: Add alignment record writer

[zaeleus]

Currently, I cannot compile the async Writer due to

error[E0308]: mismatched types
   --> noodles-util/src/alignment/async/io/writer.rs:80:63
    |
80  |             Self::Cram(writer) => writer.write_record(header, record).await,
    |                                          ------------         ^^^^^^ expected `Record`, found `&dyn Record`
    |                                          |
    |                                          arguments to this method are incorrect
    |
    = note: expected struct `noodles_cram::Record`
            found reference `&dyn noodles_sam::alignment::Record`
note: method defined here
   --> /Users/michael/Projects/noodles/noodles-cram/src/async/io/writer.rs:181:18
    |
181 |     pub async fn write_record(
    |                  ^^^^^^^^^^^^

Which is coming from the fact that cram::async::io::Writer::write_record takes a cram::Record type rather than a &dyn > sam::alignment::Record trait.

noodles/noodles-cram/src/async/io/writer.rs

Line 184 in 174ad3c

mut record: Record,

Originally posted by @mbhall88 in #292 (comment)

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The async CRAM writer is missing the equivalent of cram::io::Writer::write_alignment_record.