Fix total test count while running over loop (valkey-io#2524)

Command: `./runtest --single unit/bitops --loops 3`

Unstable

```
[ignore]: large memory flag not provided
[-1/1 done]: unit/bitops (4 seconds)
[ignore]: large memory flag not provided
[0/1 done]: unit/bitops (4 seconds)
[ignore]: large memory flag not provided
[1/1 done]: unit/bitops (4 seconds)

                   The End

Execution time of different units:
  4 seconds - unit/bitops
  4 seconds - unit/bitops
  4 seconds - unit/bitops
```

After fix

```
[1/3 done]: unit/bitops (4 seconds)
[ignore]: large memory flag not provided
[2/3 done]: unit/bitops (4 seconds)
[ignore]: large memory flag not provided
[3/3 done]: unit/bitops (4 seconds)

                   The End

Execution time of different units:
  4 seconds - unit/bitops
  4 seconds - unit/bitops
  4 seconds - unit/bitops
```

Signed-off-by: Sarthak Aggarwal <sarthagg@amazon.com>

Author: sarthakaggarwal97

tests/test_helper.tcl

@@ -94,6 +94,8 @@ set ::log_req_res 0
 set ::force_resp3 0
 set ::solo_tests_count 0
 set ::debug_defrag 0
+set ::completed_tests 0
+set ::total_loops 1
 
 # Expand a unit specification (test name, file, or directory) into a list
 # of canonical unit names relative to the tests directory.
@@ -449,10 +451,9 @@ proc read_from_test_client fd {
         signal_idle_client $fd
     } elseif {$status eq {done}} {
         set elapsed [expr {[clock seconds]-$::clients_start_time($fd)}]
-        set all_tests_count [expr {[llength $::all_tests]+$::solo_tests_count}]
-        set running_tests_count [expr {[llength $::active_clients]-1}]
-        set completed_solo_tests_count [expr {$::solo_tests_count-[llength $::run_solo_tests]}]
-        set completed_tests_count [expr {$::next_test-$running_tests_count+$completed_solo_tests_count}]
+        incr ::completed_tests
+        set all_tests_count [expr {[llength $::all_tests] * $::total_loops + $::solo_tests_count}]
+        set completed_tests_count $::completed_tests
         puts "\[$completed_tests_count/$all_tests_count [colorstr yellow $status]\]: $data ($elapsed seconds)"
         lappend ::clients_time_history $elapsed $data
         unset ::active_clients_file($fd)
@@ -831,12 +832,14 @@ for {set j 0} {$j < [llength $argv]} {incr j} {
         set ::stop_on_failure 1
     } elseif {$opt eq {--loop}} {
         set ::loop 2147483647
+        set ::total_loops $::loop
     } elseif {$opt eq {--loops}} {
         set ::loop $arg
         if {$::loop <= 0} {
             puts "Wrong argument: $opt, loops should be greater than 0"
             exit 1
         }
+        set ::total_loops $::loop
         incr j
     } elseif {$opt eq {--timeout}} {
         set ::timeout $arg