go test -v ./... failures

Trying to run the tests, it fails:
```
$ go test -v ./...
...
cmd/bulk_load_timescale/main.go:20:2: module github.com/jackc/pgx@latest found (v3.6.2+incompatible), but does not contain package github.com/jackc/pgx/pgxpool
```

[Googling](https://github.com/jackc/pgx/issues/655#issuecomment-569834589), this should be `github.com/jackc/pgx/v4/pgxpool` now.

So apply the following diff:
```
$ git diff
diff --git a/cmd/bulk_load_timescale/main.go b/cmd/bulk_load_timescale/main.go
index e366584..6303b71 100644
--- a/cmd/bulk_load_timescale/main.go
+++ b/cmd/bulk_load_timescale/main.go
@@ -16,8 +16,8 @@ import (

"github.com/influxdata/influxdb-comparisons/bulk_load"
"github.com/influxdata/influxdb-comparisons/util/report"
- "github.com/jackc/pgx"
- "github.com/jackc/pgx/pgxpool"
+ "github.com/jackc/pgx/v4"
+ "github.com/jackc/pgx/v4/pgxpool"

"bytes"
"context"
diff --git a/cmd/query_benchmarker_timescale/main.go b/cmd/query_benchmarker_timescale/main.go
index 3c79f4c..74f0ee6 100644
--- a/cmd/query_benchmarker_timescale/main.go
+++ b/cmd/query_benchmarker_timescale/main.go
@@ -22,8 +22,8 @@ import (
"strings"

"github.com/influxdata/influxdb-comparisons/util/report"
- "github.com/jackc/pgx"
- "github.com/jackc/pgx/pgxpool"
+ "github.com/jackc/pgx/v4"
+ "github.com/jackc/pgx/v4/pgxpool"
)

type TimescaleQueryBenchmarker struct {
```

Then run `go mod tidy`. Now we can get some test results but still see failures (apparently need a V1 and and V2 influxdb running?):
```
# github.com/gocql/gocql
../../go/pkg/mod/github.com/gocql/gocql@v1.2.1/dial.go:79:18: tconn.HandshakeContext undefined (type *tls.Conn has no field or method HandshakeContext)
? github.com/influxdata/influxdb-comparisons/bulk_data_gen/common [no test files]
? github.com/influxdata/influxdb-comparisons/bulk_data_gen/dashboard [no test files]
? github.com/influxdata/influxdb-comparisons/bulk_data_gen/devops [no test files]
? github.com/influxdata/influxdb-comparisons/bulk_data_gen/iot [no test files]
? github.com/influxdata/influxdb-comparisons/bulk_data_gen/metaqueries [no test files]
? github.com/influxdata/influxdb-comparisons/bulk_data_gen/multi_measurement [no test files]
# github.com/influxdata/influxdb-comparisons/bulk_query/http
bulk_query/http/http_client.go:124:14: Fprintf format %s has arg pretty of wrong type bytes.Buffer
? github.com/influxdata/influxdb-comparisons/bulk_load [no test files]
# github.com/influxdata/influxdb-comparisons/bulk_query
vet: bulk_query/query.go:431:2: waitFinished declared but not used
=== RUN TestResultsInfluxDbV1
result_test.go:29:
Error Trace: /home/ubuntu/code/influxdb-comparisons.git/util/report/result_test.go:29
Error: Received unexpected error:
dial tcp4 127.0.0.1:8086: connect: connection refused
Test: TestResultsInfluxDbV1
--- FAIL: TestResultsInfluxDbV1 (0.00s)
=== RUN TestResultsInfluxDbV2
result_test.go:52:
Error Trace: /home/ubuntu/code/influxdb-comparisons.git/util/report/result_test.go:52
Error: Received unexpected error:
dial tcp4 127.0.0.1:9999: connect: connection refused
Test: TestResultsInfluxDbV2
--- FAIL: TestResultsInfluxDbV2 (0.00s)
FAIL
FAIL github.com/influxdata/influxdb-comparisons/util/report 0.003s
```

Review cmd/bulk_load_timescale/main.go and cmd/query_benchmarker_timescale/main.go, then run go mod tidy and go test -v ./.... The reported import errors are addressed by the shown diff, but the remaining gocql, vet, and InfluxDB connection failures make the scope uncertain. Done should be defined as resolving the intended build failures and documenting or handling the required V1 and V2 services.

Written by the indexing model from the issue text.