feat: Added a --matrix-count parameter to versioned tests

[jsumners-nr]

This PR adds a new option to the versioned tests runner that enables calculating the number of tests that will be run and printing only that information.

Example output

# ... snipped
@prisma/client(19)
prisma(104)


Module Test Versions Counts
@apollo/gateway                        6
@apollo/server                         12
@apollo/subgraph                       15
@aws-sdk/client-api-gateway            322
@aws-sdk/client-bedrock-runtime        68
@aws-sdk/client-dynamodb               337
@aws-sdk/client-elastic-load-balancing 318
@aws-sdk/client-elasticache            325
@aws-sdk/client-lambda                 337
@aws-sdk/client-rds                    364
@aws-sdk/client-redshift               326
@aws-sdk/client-rekognition            325
@aws-sdk/client-s3                     356
@aws-sdk/client-ses                    321
@aws-sdk/client-sns                    322
@aws-sdk/client-sqs                    322
@aws-sdk/lib-dynamodb                  125
@aws-sdk/util-dynamodb                 342
@elastic/elasticsearch                 18
@elastic/transport                     8
@grpc/grpc-js                          8
@hapi/hapi                             7
@hapi/vision                           4
@koa/router                            11
@langchain/community                   3
@langchain/core                        2
@langchain/openai                      3
@nestjs/cli                            14
@prisma/client                         19
amazon-dax-client                      1
amqplib                                6
apollo-server                          14
apollo-server-express                  14
async-listener                         7
aws-sdk                                1,216
axios                                  36
bluebird                               20
body-parser                            21
bunyan                                 2
cassandra-driver                       11
connect                                39
continuation-local-storage             3
director                               1
ejs                                    21
express                                16
express-enrouten                       8
fastify                                75
flush-write-stream                     3
generic-pool                           0
graphql                                42
graphql-tag                            18
ioredis                                37
kafkajs                                3
koa                                    16
koa-route                              4
koa-router                             12
memcached                              1
middie                                 21
mongodb                                46
mysql                                  17
mysql2                                 16
next                                   9
openai                                 57
parse-json                             14
pg                                     11
pg-native                              4
pino                                   37
prisma                                 104
q                                      3
react                                  42
react-dom                              30
redis                                  19
restify                                27
restify-errors                         13
split2                                 13
superagent                             27
swagger-ui-express                     12
undici                                 59
when                                   1
winston                                15
winston-transport                      8
----------------------------------------
total:                                 6,892

real	0m8.135s
user	0m4.113s
sys	0m1.883s

[bizob2828]

LGTM. verified versioned runner still works and will only print out this count when passing in -m